package top.aiprogram.helloworld;

//兼容包
import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import top.aiprogram.helloworld.R;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);//生命周期函数，必须调用父类的对应方法
        setContentView(R.layout.activity_main);
    }

}
